Core-box.



A. H. KUDLIGH.

GORE BOX.

APPLIGATION FILED APR. 4, 1906.

Patented 001;.27Q1908.

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ALFRED H. KUDLI'GII, OF'LYNN, MASSACHUSETTS, ASSIGNOR TO GENE COMPANY, A CORPORATION OF NEW YORK.

AL ELECTRIC Application filed April Q,

Specification of Letters Patent.

Patented Got. 27, 1908.

1906. Serial No. 309,766.

.E v box by means ()1 which a plurality of separatcly 't'ormcd articles, such For example buckets tor-'elastic-tluid turbines, can be ac curatoly embedded in a core, and this at a minimum cost and with the type of help usually available in a foundry.

Owing to the special requirements of elastic-tluid turbines, great accuracy is required in the formation of such cores. The buck ets must be properly alined in a longitudinal direction, and for axial-flow-machines the ends must be located in arcs of circles and must also occupy the same plane so that one will. not project laterally beyond the others on either side. The pitch distance between buckets, whatever it may he, must be care fully preserved at both ends. Again, the buckets in the core must occupy such positions that the entrance and exit angles con form exactly to certain theoretical requirements which need not be here specified.

The relation of the buckets for one row ditt'ers from that of every other row, and in addition vary somewhat in length and cross sectional area, all ot which increases the cost and ditliculties of construction.

It is of the utmost importance thitthe core-box be of such a construction as to cnable the average core-maker to turn out accurately made cores of uniform quality in a minimum amount of time, and this without waste of material or imperfect results.

In the accompanying drawing'is shown a core-box illustrating one of the embodiments of which the invention is capable, wherein Figure 1 is a'view in side elevation of a core-box with certain parts broken away to show the interior; Fig. 2 is a plan view oi? the box showing it partially filled .with core making material; Fig. is across section of the core-box; and Fig". l is a. perspective view showing the guides and space-blocks for the buckets.

1. represents the base of the box to which 5 end pieces 2 and 3 are permanently secured.

=1 and 5 are side pieces adapted to c:

t the flat surfaces of the base and end portions and with them. form a receptacle to receive the buckets or other articles to be embedded in the core, and ,are held in place by end clamps O and T] The form of the clamp can be varied to suit the requirements. The position oi the sides is located by the pins 7 which also assist in holding them.

In the. present. illustration the box is in tended for making cores containing buckets tor elastiofluid turbines, the said buckets being radially disposed with the ends occupying arcs of circles. The pitch distance between the buckets must be carefully preserved, as well as the entrance and exit angles of the buckets one to the other. The

points to receive. the segmental guides S and side of the end pieces and the other two on the other side. The guide consists of a rectangular piece of metal of segmental form and is provided with notches or grooves 10 extending radially. The pitch of these grooves the same tlrroughont the guide 9, and the pitch of the grooves in the guide 11 corresponds therewith. The pitch of the grooves in the lower guide 8 and in the corresponding guide 12 located on the back side may be the same as that of the upper guides S) and 11 so that the shape of the space between the buckets will be the same at the upper end as at the lower end, or the pitch may be somewhat so that the buckets will occupy truly radial positions and have the same center.

hand buckets, the guides 8, 9, 11 and 12 are provided with duplicate sets of grooves 13, one set being in operation at a time. This is readily accomplished by providiir the guides with a set of grooves on each side, as shown in plan in Fig. 2 a l in perspective in Fig. The guides are held n place by the side walls of the reces i and of the box, an position determined 12% that enter holes therein. Tihey are p nted tron: coming out of the recesses by the side plates el; and

In order to prevent the core material from covering; the ends at the buckets that are to t be cast into the base white the core being i *l'ormcd, combined tiller and space-blocks Lt,

end portions 2 and are recessed at four- 9. Two oi these recesses are formed on one.

In order to use the box for rightand left the top 15 and 16 are provided. The blocks 14 and 16 are located at the ends and engage the outside buckets and the ends 2 and 3 of the box. The blocks 15 are situated betweenv patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but

the buckets and conform in shape on oppol I desire to have it understood that the apsite sides to the wallsof the buckets as paratus shown is only illustrative, and that shown in Fig. 4:. These blocks are also rethe invention can be carried out by other tained in position partly by the longitudinally extendin strlps 17 that project over the shoulders ormed on the blocks and are secured to the lower guides by screws 18,

- The base and end portions being united are mounted upon a suitable bench or table, and the guides 8, 9, 11 and 12 mounted in place. The buckets 19 are then slipped into place one after the other through the notches 10 in the guides, and between the blocks 14, 15 and 16 which were previousl placed in the lower portion of the box w ile the guides 8 and 12 were being mounted in position. After the buckets are in place and properly aliined'with their-inner ends resting on the upper convex surface of the base 1, the side pieces 4 and 5 are mounted in place and afterwards held by the end clamps 6 and 7.

' The core-maker then places the box in a convenient position and throws handful after handful of core material in between the buckets. He then takes a stick and rams the material between the buckets until it has the roper degree of hardness. If the buckets 0 not extend to the top of the "box it is customary to fill the space between them and of the boxwith core material which is leveled oil after being properly rammed. The box is then turned over on its side and .the clamps 6 and 7 and side 5 removed. The

upper guide 9 is then removed and the space former y occnpied' thereby filled with core material, and properly packed. If it is desired to strengthen the core by the introduction of wires, they are inserted in said space before it is com letely filled. The guide 8 is then remove After this is done, the surface of the core is smoothed off and the core-box covered by an iron plate and turned over' bodily to present the opposite side. The side 4 is then removed to expose the core, after which'the guide 11 is removed and the space filled with core material. The guide 12 is then removed and the space filled. Next the base and ends are removed and the space-blocks 14:, 15 and 16 taken out. When this is done, the ends of the buckets will project from the core by an amount corresponding to the depth of the space-blocks. By

varying the depth of the space-blocks the length of the buckets exposed beyond thecore can readily be varied. The final step is to place the core and the supporting iron plate in an oven and bake 1t.

In accordance with the provisions of the means.

\V hat I claim as new and desire to secure by Letters Patent of the United States, is, 1. A core-box comprising a receptacle to receive the core material having removable guides arranged in a plurality of pairs to space a series of articles to be embedded in the core and hold them adjacent each end by their opposite edges.

2. A core-box comprising a receptacle to receive core material for forming a core with a group of articles embedded therein,

said receptacle having guides for spacing and holding the articles which engage their edges intermediate their ends, and removable guiding means for the ends of the articles which when removed leaves said ends projecting from the core.

3. A core-box comprising a receptacle to receive core material for forming a core with a group of articles embedded therein, said receptacle having removable guiding devices which engage the opposite edges of the articles adjacent one set of their ends and a removable guiding device for the other ends of the articles, said devices spacing and holding the group of articles in position in the receptacle.

4. A core-box comprising a receptacle to receive the core material, guides having grooves to receive the edges of the articles to be embedded in the core.to preserve their alinement, and means for preventing the core material from covering the ends of said articles while the core is being formed.

5. A COI'G'bOX con'iprising a receptacle to receive the core material, guides arranged to receive and hold the articles to be embedded in the core by their edges, and removable blocks which are located between the ends of said articles so that the ends thereof will be exposed when the core is completed.

6. A core-box comprising a receptacle to receive the core 'material, guides arranged in pairs on each side of the articles to be embedded in the core, which engage said articles and hold them by their edges while the core is being formed, and means for pre venting the core material from covering the ends of the articles which are to be united'by a casting.

7. A core-box comprising a base, recessed end portions and sides, removable guides located in the -.recesses and between the ends and sides,'which engage and hold the articles to be embedded in the core, and s acers located between the ends of said artic es.

8. A core-box comprisinga base, end and lo be embedded in Hie gore and held them side portions, removable guides having sets of grooves an opposite aides. each set arranged to receive the edges 0f the articles in alinenient, one set being for one kind 01% articles end'the other for a different kind, spacers l sated hetweei'l the ends 01"? the articles in he united by a casting, and other spacer" located between the said articles and the end portiens of the hex.

' 9. A core-hex comprising a base end and side poi-hens, removable guides arranged in pairs 011 each side of and engaging the artiales to be embedded in the eere and suitably spaced apart, spacers iecaied between the ends of the said articles, and means carrieijl by the guides for holding the spacers in pesition.

see-2e 2- 10. A core-hex comprising e base having one of its. surfeees farmed (mine are 01 e l circle, which acts a stop for the articles is he embedded in the (zero, end and side portions, guides arranged in pairs 011'0pp0- site sides of said articles to hold them in placgend spacers Which rest on the curved surface of the base and are situated between ihe ends of the said articles.

11. A core-box comprising e base, end and side pertions, guides for holding the articles I to be embedded in the core by their edges pins for locating the longitudinal position of the guides, and filling pieces situated between the ends of the said articles.

in Witness whereof, I have hereunto set my hand this 27th day of March, 1906.

ALFRED H. KUDLICH.

Wiinesses:

JOUN A. McMANUs, J I'IENRY U. W STENDARP. 

